benzhydryl (6R,7S)-7-amino-3-[(2-methyltetrazol-5-yl)sulfanylmethyl]-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 、
phenylmalonic acid monodiphenylmethyl ester 生成 benzhydryl (6R,7S)-7-[[(2R)-3-benzhydryloxy-3-oxo-2-phenylpropanoyl]amino]-3-[(2-methyltetrazol-5-yl)sulfanylmethyl]-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate